Fill in the blanks: The Application Layer Firewalls inspect traffic through the ______ layer(s) of the TCP/IP model and up to and including the ______ layer.
The Application Layer Firewalls inspect traffic through the Lower layer(s) of the TCP/IP model and up to and including the Application layer. The lower layers are the Physical, Data Link, and Network layers, which deal with the transmission and routing of packets. The Application layer is the highest layer of the TCP/IP model, which provides services and protocols for specific applications such as HTTP, FTP, SMTP, etc. The Application Layer Firewalls can inspect the content and context of the traffic and enforce granular security policies based on various criteria such as user identity, application identity, content type, etc. References: [Check Point R81 Firewall Administration Guide]
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